import java.util.Scanner;

// 注意类名必须为 Main, 不要有任何 package xxx 信息
public class Test {
    public static void main(String[] args) {
        Scanner in = new Scanner(System.in);
        // 注意 hasNext 和 hasNextLine 的区别
        while (in.hasNextLine()) { // 注意 while 处理多个 case
            float x = in.nextFloat();
            String c = in.next();
            int base = 20;
            int ext = 0;
            if(x > 1){
                float wight = x - 1;
                ext = (wight == (int)wight) ? (int) wight:(int)wight+1;
            }
            int uer = "y".equalsIgnoreCase(c) ? 5 : 0;
            System.out.println(base + ext * 1 + uer);
        }
    }
}